/*
 * Copyright (C) 2009 Apple Inc. All rights reserved.
 * Copyright (C) 2013 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef SKY_ENGINE_PLATFORM_ANIMATION_ANIMATIONVALUE_H_
#define SKY_ENGINE_PLATFORM_ANIMATION_ANIMATIONVALUE_H_

#include "flutter/sky/engine/platform/animation/TimingFunction.h"
#include "flutter/sky/engine/platform/transforms/TransformOperations.h"

#include "flutter/sky/engine/wtf/PassRefPtr.h"
#include "flutter/sky/engine/wtf/RefPtr.h"

namespace blink {

// Base class for animation values (also used for transitions). Here to
// represent values for properties being animated via the GraphicsLayer,
// without pulling in style-related data from outside of the platform directory.
class AnimationValue {
  WTF_MAKE_FAST_ALLOCATED;

 public:
  explicit AnimationValue(double keyTime,
                          PassRefPtr<TimingFunction> timingFunction = nullptr)
      : m_keyTime(keyTime), m_timingFunction(timingFunction) {}

  virtual ~AnimationValue() {}

  double keyTime() const { return m_keyTime; }
  const TimingFunction* timingFunction() const {
    return m_timingFunction.get();
  }
  virtual PassOwnPtr<AnimationValue> clone() const = 0;

 private:
  double m_keyTime;
  RefPtr<TimingFunction> m_timingFunction;
};

// Used to store one float value of an animation.
class FloatAnimationValue final : public AnimationValue {
 public:
  FloatAnimationValue(double keyTime,
                      float value,
                      PassRefPtr<TimingFunction> timingFunction = nullptr)
      : AnimationValue(keyTime, timingFunction), m_value(value) {}
  virtual PassOwnPtr<AnimationValue> clone() const override {
    return adoptPtr(new FloatAnimationValue(*this));
  }

  float value() const { return m_value; }

 private:
  float m_value;
};

// Used to store one transform value in a keyframe list.
class TransformAnimationValue final : public AnimationValue {
 public:
  explicit TransformAnimationValue(
      double keyTime,
      const TransformOperations* value = 0,
      PassRefPtr<TimingFunction> timingFunction = nullptr)
      : AnimationValue(keyTime, timingFunction) {
    if (value)
      m_value = *value;
  }
  virtual PassOwnPtr<AnimationValue> clone() const override {
    return adoptPtr(new TransformAnimationValue(*this));
  }

  const TransformOperations* value() const { return &m_value; }

 private:
  TransformOperations m_value;
};

}  // namespace blink

#endif  // SKY_ENGINE_PLATFORM_ANIMATION_ANIMATIONVALUE_H_
